A:
Positive:
1 x 722140913 x 55549347 x 15364753 x 136253223 x 32383611 x 11819689 x 104812491 x 2899
Negative:
-1 x -7221409-13 x -555493-47 x -153647-53 x -136253-223 x -32383-611 x -11819-689 x -10481-2491 x -2899
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 7,221,409, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 7,221,409 | |
| -1 | -7,221,409 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,221,409.
Example:
1 x 7,221,409 = 7,221,409
and
-1 x -7,221,409 = 7,221,409
Notice both answers equal 7,221,409
With that explanation out of the way, let's continue. Next, we take the number 7,221,409 and divide it by 2:
7,221,409 ÷ 2 = 3,610,704.5
If the quotient is a whole number, then 2 and 3,610,704.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,221,409 | |
| -1 | -7,221,409 |
Now, we try dividing 7,221,409 by 3:
7,221,409 ÷ 3 = 2,407,136.3333
If the quotient is a whole number, then 3 and 2,407,136.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,221,409 | |
| -1 | -7,221,409 |
Let's try dividing by 4:
7,221,409 ÷ 4 = 1,805,352.25
If the quotient is a whole number, then 4 and 1,805,352.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,221,409 | |
| -1 | 7,221,409 |
If you did it right, you will end up with this table:
| 1 | 13 | 47 | 53 | 223 | 611 | 689 | 2,491 | 2,899 | 10,481 | 11,819 | 32,383 | 136,253 | 153,647 | 555,493 | 7,221,409 |
| -1 | -13 | -47 | -53 | -223 | -611 | -689 | -2,491 | -2,899 | -10,481 | -11,819 | -32,383 | -136,253 | -153,647 | -555,493 | -7,221,409 |
Here are some more numbers to try:
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